/// <summary>
/// Application entry point Main
/// </summary>
/// <param name="args">ID SERVICE-URL $ENTRY-URL</param>
///
public static void Main(string[] args)
{
Uri serviceUri = new Uri(args[1]);
int tcpPort = serviceUri.Port;
int id = int.Parse(args[0]);
String[] segments = args[1].Split('/');
String remoteObjectName = segments[segments.Length - 1];
//Create Service on this work
BinaryServerFormatterSinkProvider provider = new BinaryServerFormatterSinkProvider();
IDictionary props = new Hashtable();
props["port"] = tcpPort;
props["timeout"] = 6000; // in milliseconds
TcpChannel channel = new TcpChannel(props, null, provider);
ChannelServices.RegisterChannel(channel, true);
RemotingConfiguration.RegisterWellKnownServiceType(typeof(WorkerServices), remoteObjectName, WellKnownObjectMode.Singleton);
try {
IWorker newWorkerObj = (IWorker)Activator.GetObject(typeof(IWorker), serviceUri.ToString());
// Register new worker in itself passing the ID and the URI
newWorkerObj.RegisterOwnWorker(id, serviceUri.ToString());
} catch (SocketException e) {
System.Console.WriteLine("[WORKER_ERROR1:MAIN] Could not locate server");
System.Console.WriteLine(e.StackTrace);
} catch (Exception e) {
System.Console.WriteLine("[WORKER_ERROR2:MAIN] Could not locate server");
System.Console.WriteLine(e.StackTrace);
}
// If outer jobtracker exists
if (args.Length >= 3)
{
try {
String jobTrackerUri = args[2];
IWorker jobTrackerObj = (IWorker)Activator.GetObject(typeof(IWorker), jobTrackerUri);
// Broadcast to the network the new worker
jobTrackerObj.BroadcastNewWorker(id, serviceUri.ToString());
} catch (SocketException e) {
System.Console.WriteLine("[WORKER_ERROR3:MAIN] Could not locate server");
System.Console.WriteLine(e.StackTrace);
} catch (Exception e) {
System.Console.WriteLine("WORKER_ERROR4:MAIN] Could not locate server");
System.Console.WriteLine(e.StackTrace);
}
}
System.Console.WriteLine("Press <enter> to terminate server...");
System.Console.ReadLine();
}
/// <summary>
/// Alerts the network that this node is alive
/// </summary>
public void WorkerIsAliveAsync()
{
while (true)
{
TestFrozenW();
Thread.Sleep(2000);
//Can we connect to a jobTracker
bool jobTrackerAvailable = false;
//Is Worker Working
if (myWorkerStatus.getStatus() != WorkStatus.Status.Idle)
{
//Ask the jobTracker if he is alive
IWorker jobTrackerObject = (IWorker)Activator.GetObject(typeof(IWorker), currentJobTracker);
try {
bool isJobTracker = jobTrackerObject.IsJobTrackerAlive(ownId, ownUrl, myWorkerStatus.getStatus() != WorkStatus.Status.Idle);
jobTrackerAvailable = isJobTracker; //Worker connected but his he the jobTracker
} catch (Exception) { //Cannot connect to job Tracker - 1st try
//Try again
try {
bool isJobTracker = jobTrackerObject.IsJobTrackerAlive(ownId, ownUrl, myWorkerStatus.getStatus() != WorkStatus.Status.Idle);
jobTrackerAvailable = isJobTracker; //Worker connected but his he the jobTracker
} catch (Exception) { //Cannot connect to job Tracker 2nd try
Console.WriteLine("Cannot connect to primary jobTracker:" + currentJobTracker);
}
}
if (!jobTrackerAvailable) //Job Tracker not available
{
Console.WriteLine("Cannot connect to primary jobtracker on: " + currentJobTracker + "! Testing second jobtracker");
int id = int.MaxValue;
string url = "";
//Get the first non-jobtracker on the last view
workersIDUrlMutex.WaitOne();
foreach (KeyValuePair <int, string> workerPair in workersIDUrl)
{
if (workerPair.Value != currentJobTracker && workerPair.Key < id)
{
id = workerPair.Key;
url = workerPair.Value;
}
}
workersIDUrlMutex.ReleaseMutex();
Console.WriteLine(">>>" + url);
if (id == ownId && url == ownUrl)
{
Console.WriteLine("I'm new jobtracker");
// Create Queue with workers
availableWorkerToJob = new ArrayList();
foreach (KeyValuePair <int, string> worker in workersIDUrl)
{
availableWorkerToJob.Add(worker.Value);
}
queueWorkersSemaphore = new Semaphore(workersIDUrl.Count(), workersIDUrl.Count());
currentJobTracker = url;
jobsAssigmentMutex.WaitOne();
foreach (WorkStatus ws in jobsAssigment)
{
if (ws.isWorkerAssigned() && !ws.isWorkCompleted())
{
ws.removeWorker();
}
}
jobsAssigmentMutex.ReleaseMutex();
//Launch thread to isAlive
Thread isAliveThread = new Thread(() => IsAliveAsync());
isAliveThread.Start();
//Launch Thread to distribute works
Thread distributeWorkAsyncThread = new Thread(() => DistributeWorkAsync(className, dllCode, clientUrl));
distributeWorkAsyncThread.Start();
}
else
{
Console.WriteLine("New jobtracker on: " + url);
currentJobTracker = url;
jobTrackerAvailable = true;
/*
* //Ask the secondJobTracker if he is alive
* IWorker secondJobTrackerObject = (IWorker)Activator.GetObject(typeof(IWorker), url);
*
* try {
*
* bool isSecondJobTracker = secondJobTrackerObject.IsJobTrackerAlive(ownId, ownUrl, myWorkerStatus.getStatus() != WorkStatus.Status.Idle);
*
* if (isSecondJobTracker) {//Second jobTracker is alive but is he jobtracker?
*
* currentJobTracker = url;
* jobTrackerAvailable = true;
*
* }
*
* } catch (Exception) { //Cannot connect to second job Tracker 2nd try
*
* //Nothing to do
* }*/
}
}
}
if (!jobTrackerAvailable) //When none of the jobTrackers are alive
{
foreach (KeyValuePair <int, string> node in workersIDUrl)
{
try{
IWorker nodeObj = (IWorker)Activator.GetObject(typeof(IWorker), node.Value);
//Am I in the network?
if (!nodeObj.IsNodeInNetwork(node))
{
nodeObj.BroadcastNewWorker(ownId, ownUrl);
}
//When it is in the network
break;
}catch (Exception e) {
//Can't connect to this one, try another one
continue;
}
} // if no worker connects it means that the network doesn't exist
}
}
}
